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    SubjectRe: [rfc][patch] ide: fix unneeded LBA48 taskfile registers access
    Hello Tejun,

    On Thu, 10 Feb 2005 09:01:58 +0900, Tejun Heo <> wrote:
    > Hello, Bartlomiej. Happy new lunar year.
    > Bartlomiej Zolnierkiewicz wrote:
    > >
    > > I would prefer to not teach do_rw_taskfile() about ->tf_{in,out}_flags
    > > (and convert all users to use helpers) - it is much simpler this way,
    > >
    > > ->flags field in ide_task_t is needed anyway (32-bit I/O flag).
    > >
    > New lunar year day is one of the biggest holidays here, so I haven't
    > got time to work for a few days. As it's over now, I began to work on
    > ide drivers again. I applied your task->flags patch and am moving my
    > patches over it.
    > One problem is that, with ATA_TFLAG_LBA48, whether to use HOB
    > registers or not cannot be determined separately for writing and
    > reading. So, when initializing flush tasks, if WIN_FLUSH_CACHE_EXT is
    > used, we need to turn on ATA_TFLAG_LBA48 to read error location
    > properly, and we end up unnecessarily writing HOB registers.

    Yep, good catch.

    > I think we can...
    > 1. Just leave it as it is. It's not that big a deal.
    > 2. Use another flag(s) to control LBA48 reading/writing separately.
    > 3. do my proposal. :-)
    > I'm currently sticking to #1. Please let me know what you think.

    agreed, #1 is a good choice, it is not that important to make things
    more complicated

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